United States, Arizona, Coconino, Coconino National Forest, Knipe Tank, 6.1 miles south of the junction of I-40 (Winona Exit #211), along USFS Road 82. Tank between USFS Road 82 and the power lines. Ca. 5 miles east of Walnut Canyon National Monument. Ca. 15 miles east of Flagstaff. Winona Quad;